Yes, I think I'll just do this - although it just seems so false to me just meeting up twice a year. We see them and my kids then talk about them and ask after them for weeks/ months and then just as they get used to not seeing them we see them again - it's not the same I know but it's a bit like an absent parent not committing to their child - more damaging to see them occasionally than not at all (i know its not the same thing at all really!) but thats the only way i can describe it - anyway I'll just tell my kids thats just how it is and to enjoy the 10 hours a year or whatever it is they get with them! Thanks everyone!
Appreciate that this is how you feel, but ... to me, this seems like a weird reaction. Your children should be more than capable of having some people in their lives that they see less frequently than others and they shouldn't be pining for them; I think you're probably projecting a lot on to your kids here.
I think you just have a very specific notion of what a sibling relationship should be, and can't accept that other people, including your own sibling, don't feel they need to adhere to those rules. Two or three times a year seems perfectly normal for family who live a couple of hours away.
If your SIL's family are French, then I can absolutely see why she wants to make sure she and her children see them a lot. If she's a French person living in England then regular visits back to France and spending time with French-speaking family is the only way she can really immerse her kids in the French half of their culture.
I love my siblings very much and we get on well when see each other. But we see each other about three times a year, I'd say. And that's fine. And don't have exchanges of messages with my SIL and BIL either; I wouldn't really expect them to message me just to say hi and if we were making arrangements about something, it would just usually be my siblings who would get in touch rather than their partners because they're closest to me.
I appreciate you feel differently about this, and you can't help the way you feel, but your brother's done nothing wrong.